Gael johan ltindstrom



`(No Model.)

0. J. LUNDSTROM.

2 sheets-sheet 2.

GBNTRIPUGAL LIQUID SBPRATOR.

Patented Feb. 6, 1894.

enzow.

its bottom with a bearing A2 in which the up- UNITED STATES PATENTOFFICE .CARL J OHAN'LUNDSTROM, OF LITTLE FALLS, NEW YORK, ASSIGNOR TO D.

` BURRELL & CO., OF SAME PLACE.

CENTRIFUGAL LIQUID-SEPARATOR.

sPEoIFrcATIoN forming part of Letters Patent No. 514,156, dated Februarye, 1894.

Application tiled January 24, 1893.

To a/ZZ whom it may concern.-

Be it known thatl, CARLJOHAN LUNDsTRoM, a sub; ect of the King of Swedenand Norway, reslding at Little Falls, in the county of -Herkimer andState of New York, have invented a new and useful Improvement inCentrifugal Llquld-Separators, of which the following is aspecification.

This invention relates to that class of centrifugal-separating machineswhich are employed'.V for separating a compound liquid or emulslon intoits constituent liquids of different densities, particularly forseparating full milk into cream and skim milk. These separators areprovided with imperforate drums or bowls which are in many casesfilledwlth numerous division rings whereby the body of liquid is divided intothin layers and which are designed to increase the separating capacityof the machine. i

The object of my invention is to simplify the means placed within theliquid space of the bowl for the purpose of 'increasing its separatingcapacity.

In the accompanying drawings consisting of two sheets:-Figure lis avertical section of the centrifugal creamer provided with myimprovements, the section being taken inline 1 1, Fig. 2. Fig. 2 is ahorizontal section in line 2-2, Fig. l. Figs. 3 and 4 are verticalsections, on a reduced scale, showing different forms of the internalcone. Like letters of reference refer to like parts 1n the severalgures. A` represents the stationary curb or incloslng case of themachine which is of any ordlnary construction and supported -in theusual way on standards A and provided in per part of the spindle B isjournaled. The spindle is rotated in the usual way by a belt andpulleys, or by a steam turbine, or by other suitable mechanism.

C represents the bottom and O the vertical peripheral wall of the bowl,formed in one piece with or-secured tothe bottom.

C2 represents a bottom plate which may be arranged underneath the bottomC of the bowl and which rests upon a shoulder c formed at the -upper endof the spindle B around an upwardly projecting screw shank Serial No.459.533. (No model.)

c of less diameter than the spindle. This bottom plate reinforces thebottom of the bowl and is secured thereto by rivets, or otherwise- Drepresents the feed cup arranged centrally on the bottom of the bowl andprovided in its bottom with a screw-threaded opening by means of whichit is screwed to the upper end ofthe shank c of the spindle, sothat thefeed cup serves as a screw nut for securing the bowl to the spindle. Thefeed cup is preferably made flaring downwardly and provided in itsperipheral wall with one or more apertures d through which the full milkescapes 'therefroln These apertures may be provided with discharge pipesd projecting outwardly from the cup, if desired.

E represents the cover of the bowl, which rests near its outer edge upona packing ring e arranged in a groove formed in the top of theperipheral wallvof the bowl, and which tapers upwardly to a contractedneck E'. This cover is provided on its under side with the usual skimmilk discharge pipes f and in its contracted neck with the cream outletf G G are two superposed receptacles supported upon' theV curb A andreceiving re-` spectively the skim milk and the cream from the skim milkpipes f and the cream outlet f.

H represents the milk receptacle which receives the milk to be separatedand which is provided with a depending discharge pipe h.

I represents a tubular stem arranged axially in the drum and securedwith its lower screwthreaded end in a screw-threaded opening formed inthe top of the feed cup D. A jam nut is preferably applied to thistubular stem upon the top of the feed cup. The upper portion of thistubular stem passes loosely through the contracted neck of the cover andis provided at its upper end with an external screw thread to which ascrew nut j is applied which bears upon the neck of the cover andpresses the cover down upon its seat on the bowl, so that by means ofthis stem and screw nut the cover is secured to the bowl in a verysimple manner, and can be lifted off upon removing the screw nut.

The depending pipe h of the milk receptacle is arranged centrally in theupperrportion of the tubular stem and is so much smaller IOC in diameterthan the stem that the milk, issuing from the pipe h, drops directlyinto the feed cup and does not come in contact with the inner surface ofthe stem, the rotation of which would retard the downward movement 0fthe milk coming in contact therewith. In order to prevent any milk whichmay come in contact with the inner surface of the stem from being drivenont ofthe upper end thereof by centrifugal force, the stem may beprovided above the outlet of the tube 7L with an inwardly projecting rimor flange.

IVhile I prefer the construction of the parts hereinbefore described Ido not wish to limit myself to the same as other suitable or well knownconstructions maybe employed,if desired.

K represents a hollow separating cone which is arranged in the liquidspace of the bowl and which rests upon the bottom of the bowl, at ornear the peripheral wall thereof, and extends obliquely upwardly andinwardly from the bottom toward the cream outlet and terminates with itscontracted end in the vicinity of the cream outlet. This cone extendsdiagonally through the thickness of the annular body of liquid in thebowl and divides that body into an inner portion L, arranged between thepoint at which the full milk is received at the bottom of the bowl andthe inner surface of the cone, and an outer portion L', arranged betweenthe outer surface of the cone and the skim milk outlet. The diameter ofthe small end of this truncated cone is somewhat larger than the innerdiameter of the cream wall so that the cream, which is separated fromthe milk on the inner side of the cone, can pass upwardly beyond thesmall end of the cone and so reach the cream outlet in the neck of thebowl.

The full milk enters first after escaping from the feed cup, the liquidspace on the inner side of the cone and is there subjected tocentrifugal action, whereby the cream globules are crowded toward theaxis of rotation while the globules of blue milk are driven outwardly.

The cream globules accumulating in the inner layer of the inner body Lof liquid are moved upwardly, toward the cream outlet by the incomingsupply of milk at the bottom of the bowl, while the particles of skimmilk or blue milk reach in their outward course the inner surface of thecone and travel downwardly along the latter under the iniiuence of thecentrifugal force and finally escape around the lower edge of the coneinto the outer portion L of the body of liquid. This cone is constructedof tin, or other suitable material, and rests loosely on the bottom ofthe bowl, so that the centrifugal force can drive the partially skimmedmilk past the lower edge of the cone. In the cuter portion of the bodyof liquid this partially skimmed milk is further separated, the creamglobules beingcrowded inwardly and flowing upwardly along the outersurface of the cone, while the particles of skimmed milk are massedagainst the inner side of the peripheral wall of the bowl and [lowupwardly along the latter to the outer ends of the skim milk pipes f,which they enter. The cream separated on the inner side of the cone andthat separated on this partially skimmed milk, which accumul" lates inthe outer layer of the inner portion of the body of the liquid, is thensubjected on the other side of the cone to a further or secondaryseparation, whereby the smaller cream globules, having less buoyancy,are separated from the skimmed milk and whereby the operation ofskimming is completed.

The cone is preferably provided on its outer side with radial blades mwhich prevent the liquid from changing its position circumferentiallywith referrnce to the cone and bowl and it may also be provided on itsinner side with radial blades fm. When it is desired to clean the bowl,the receptacles for the milk, the cream and the skim milk are removed,the cover is taken off and the cone is lifted out, whereby the entireinner surface ofthe bowl is quickly made accessible, and these parts areas quickly replaced for restoring the machine to its operativecondition.

Instead of making the cone flaring to its extreme lower edge, as shownin Fig. l, it may be flaring only part way down and its lower part maybe made cylindrical, as represented in Fig. 3.

In order to increase the separating capacity of the cone its superficialarea may be increased by corrugations, for instance, by providing itwith horizontal corrugations forming alternate ridges and depressions ofgradually decreasing diameter toward the small end of the cone, asrepresented in Fig. 4.

My improved cone adds but little to the weight of the bowl, whichlatter, when provided with this cone, is much lighter than a bowlprovided with a nest of division rings. This permits the machine to beoperated ata higher speed without an increase in power, and wherebyacorresponding increase in separating capacity is obtained.

I claim as my inventionl. The combination with the separating bowlhaving an inlet for the full milk, a discharge for the skim milkcommunicating with the peripheral portion of the bowl and a creamdischarge communicating with the cream space of the bowl, of a hollowseparating cone extending through the liquid space of the IOO IIO

bowl and terminating with its small end near the cream outlet thereof,whereby the full milk is first separated within the cone, and the creamis discharged at the small end of the cone, whilegthe partially skimmedmilk passes from the large end thereof into the space between the coneand theperipheral wall of the bowl, in which space the partially skimmedmilk is further Separated and from which the creamv and the skim milkare separately discharged, substantially as set forth.

2. The combination with the separating bowl having an inlet for the fullmilk near ered through the same cream outlet, substantially as setforth.

3. The combination with a separating bowl having an inlet for the fullmilk at its bottom and discharges for the separated cream and skim milkat its top, of a hollow separating cone extending diagonally through theliquid space of the bowl from the bottom toward the cream outlet andterminating with its small end near'the cream outlet, and u pright wingssecured to the outer side of said cone, substantially as set forth.

Witness my hand this 18th day of January, 1893. f

CARL JOHAN LUNDSTROM.

Witnesses:

GEo. W. SEARLEs, HARVEY FELDMEIER.

